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AU219945B2 - Improvements in telephone systems - Google Patents
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AU219945B2 - Improvements in telephone systems - Google Patents

Improvements in telephone systems

Info

Publication number
AU219945B2
AU219945B2 AU28253/57A AU2825357A AU219945B2 AU 219945 B2 AU219945 B2 AU 219945B2 AU 28253/57 A AU28253/57 A AU 28253/57A AU 2825357 A AU2825357 A AU 2825357A AU 219945 B2 AU219945 B2 AU 219945B2
Authority
AU
Australia
Prior art keywords
telephone systems
telephone
systems
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
AU28253/57A
Other versions
AU2825357A (en
Inventor
John Frank Greenaway and Robert Henryk Milton Kenneth George Marling
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Automatic Telephone and Electric Co Ltd
Original Assignee
Automatic Telephone and Electric Co Ltd
Filing date
Publication date
Application filed by Automatic Telephone and Electric Co Ltd filed Critical Automatic Telephone and Electric Co Ltd
Application granted granted Critical
Publication of AU219945B2 publication Critical patent/AU219945B2/en
Publication of AU2825357A publication Critical patent/AU2825357A/en
Expired legal-status Critical Current

Links

AU28253/57A 1957-05-30 Improvements in telephone systems Expired AU219945B2 (en)

Publications (2)

Publication Number Publication Date
AU219945B2 true AU219945B2 (en) 1957-12-05
AU2825357A AU2825357A (en) 1957-12-05

Family

ID=

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